1. Department of Pharmacology, College of Medicine, University of Jeddah, Jeddah P.O. Box 45311, Saudi Arabia
2. Medical Services Administration, University of Jeddah, Jeddah P.O. Box 45311, Saudi Arabia
3. Department of Family and Community Medicine, College of Medicine, University of Jeddah, Jeddah P.O. Box 45311, Saudi Arabia
4. Department of Applied Radiologic Technology, College of Applied Medical Sciences, University of Jeddah, Jeddah P.O. Box 23817, Saudi Arabia